Seminal fluid levels of hCG‐like material are determined by a radio‐immunoassay using an antibody against the β‐chain of hCG. In 267 unselected cases a significant positive correlation to sperm count and a negative correlation to the percentage of abnormal spermatozoa is found. It is suggested, that the hCG‐like material is produced in relation to normal spermatogenesis. Further on, a negative correlation to FSH serum levels occurs, which may indicate, that the hCG‐like material is produced under the cont